president obama himself now making some news weighing in on this debate. interviewed by the new republic. if i had a son, i would have to think long and hard before i let him play football. and the president went on to predict the game will have to change, again in his words, quote, change gradually to try to reduce some of the violence. want to bring in here a couple of people, open this up to multiple voices, with different perspectives on this whole discussion. we have tim green, former atlanta falcon, also an attorney and author. his newest book is titled "unstoppable." welcome to you. jay thomas, also here, back with us. emmy award winning actor and sirius radio host. and dr. debbie nampiaparampo, forgive me, also here, assistant professor at nyu's school of medicine. tim green, i wanted to begin with you here. you played for the falcons, you played eight year and i was reading and saw you -- you stopped counti ining all of you concussions. you have sons. your sons played ball. you disagree with what the president has said? >> i guess i can't disagree